Home / 21,626.24-29,781.04-20,715.80

Finding the Fourth Proportional to 21,626.24, 29,781.04 and 20,715.80

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Solution

The fourth proportional to 21,626.24, 29,781.04 and 20,715.80 is: 28,527.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,626.24 : 29,781.04 = 20,715.80 : x
  2. Step 2: Convert to fraction form
    21,626.24/29,781.04 = 20,715.80/x
  3. Step 3: Cross multiply
    21,626.24x = 29,781.04 × 20,715.80
  4. Step 4: Simplify right side
    21,626.24x = 616,938,068.43
  5. Step 5: Solve for x
    x = 616,938,068.43/21,626.24
  6. Step 6: Final answer
    x = 28,527.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.